Woldstedtius punctatus, Morishita & Watanabe, 2022

Morishita, Shunsuke & Watanabe, Kyohei, 2022, Revision of the genus Woldstedtius Carlson, 1979 (Hymenoptera, Ichneumonidae, Diplazontinae) from Japan, Deutsche Entomologische Zeitschrift 69 (1), pp. 45-64 : 45

Woldstedtius punctatus sp. nov.

Figs 6A-F , 9J

Type series.

Holotype: F, Japan, Honshu, Kanagawa Pref., Nakai Town, Zoushiki, 16 Apr 2019, K. Watanabe leg. ( KPMNH). Paratypes: Japan: [Honshu] 1 M, Niigata Pref., Nagaoka City, Joganji Town, Mt. Happoudai, 24 May 2014, S. Shimizu leg. ( KPMNH); 1 M, Saitama Pref., Urawa City, Tajima, 21 Apr 1999, T. Nambu leg. ( KPMNH); 1 F, Kanagawa Pref., Kamakura City, Nikaidou, Zuisenji, 24 Apr 1955, H. Nagase leg. ( KPMNH); 1 M, Kanagawa Pref., Oiso Town, Koma, Komayama, 16 Apr 2016, K. Watanabe leg. ( KPMNH); 1 F, Kanagawa Pref., Mt. Hinokiboramaru, 16 May 2013, (FIT) ( KPMNH); 1 M, Kanagawa Pref., Mt. Komotsurushiyama, 16 Jun 2013, (FIT) ( KPMNH); 1 F, Kanagawa Pref., Yamakita Town, Nakagawa, Mt. Hinokiboramaru, 16 Jun 2015, K. Watanabe leg. ( KPMNH); 1 F, Nagano Pref., Otaki Vil., Ontakekyuukamura, 8 Jul 2011, M. Ito leg. (LT) (TMNH); 5 M, Fukui Pref., Ikeda Town, Mizuumi, Mt. Hekosan, 18 Jun 2016, S. Shimizu leg. ( KPMNH); 2 M, ditto, 18 Jun 2016, T. Tokuhira leg. (TMNH); 1 F, Osaka Pref., Higashiosaka City, Hiraoka-park, 19 Apr 2020, Y. Yamamoto leg. ( KPMNH).

Description.

Female (n = 6). Body length 7.5-10.7 (HT: 7.5) mm, polished, coriaceous, covered with silver setae.

Head 0.5-0.53 (HT: 0.5) × as long as wide. Clypeus 1.9-2.0 (HT: 1.92) × as broad as high, slightly convex basally in lateral view. Face 2.3-2.5 (HT: 2.4) × as broad as high, densely punctate, convex medially in lateral view and separated from clypeus by shallow clypeal sulcus. Inner orbits almost parallel (Fig. 6B ). Length of malar space 1.0-1.2 (HT: 1.1) × as long as basal mandibular width. POL 2.1-2.3 (HT: 2.1) × as long as OD. OOL 0.88-1.0 (HT: 1.0) × as long as OD. POL 2.1-2.5 (HT: 2.3) × as long as OOL. Antenna with 23-25 (HT: 24) flagellomeres. FL I 1.3-1.4 (HT: 1.3) × as long as FL II. MP IV 1.25-1.5 (HT: 1.25) × as long as MP V.

Mesosoma. Lateral aspect of pronotum strigose anteriorly. Mesoscutum finely and densely punctate (separated by ca. 1.0 × their diameter) (Fig. 6C ). Scutellum coarsely and densely punctate (separated by ca. 0.8-1.3 × their diameter) (Fig. 6C ). Mesopleuron coarsely and sparsely punctate except for speculum. Sternaulus weakly impressed. Propodeum rounded in lateral view, rugulose (Fig. 6D ), without carinae except for pleural carina. Fore wing length 6.9-8.9 (HT: 7.0) mm. Nervellus intercepted below middle. Hind femur 4.25-4.5 (HT: 4.25) × as long as maximum depth in lateral view. Hind tibia 7.1-7.7 (HT: 7.1) × as long as maximum depth in lateral view. Ratio of length of hind first to fifth tarsomeres 1.0: 0.6: 0.4: 0.25: 0.3.

Metasoma. T I rectangular in dorsal view (Fig. 9J ), 1.2-1.26 (HT: 1.25) × as long as maximum width, rugulose laterally. Latero-median carina present basal ca. 0.5 of T I (Fig. 9J ). T II 0.6-0.75 (HT: 0.6) × as long as maximum width, strigose anteriorly and laterally.

Coloration (Fig. 6A-D ). Body (excluding wings and legs) black. Sometimes face with a small brown spot medially. Palpi and upper mesepisternum yellow. Mandible yellowish-brown except for apex and base. Lateral aspect of pronotum with a yellow spot posteriorly. Mesoscutum with small yellow shoulder marks. Tegula tinged with yellow anteriorly. Wings hyaline. Veins and pterostigma blackish-brown except for yellowish-brown wing base. Legs black. Apex of fore and mid trochanters, base of fore trochantellus and base of hind tibia tinged with white. Fore and mid femora, tibiae and tarsi orange. Apex of hind trochantellus and base of hind femur tinged with reddish-brown.

Male (n = 11). Similar to female. Body length (excluding antennae) 5.5-9.8 mm. Length of malar space 0.9-1.1 × as long as basal mandibular width. Inner orbits weakly divergent downward (Fig. 6F ). Fore wing length 5.0-8.0 mm.

Coloration (Fig. 6E, F ). Body (excluding wings and legs) black. Face with a large whitish-yellow spot medially and whitish-yellow longitudinal stripes along inner orbits. Clypeus, palpi, malar space, ventral surface of antenna and mesepisternum whitish-yellow. Mandible whitish-yellow except for apex. Lateral aspect of pronotum with a whitish-yellow spot posteriorly. Mesoscutum with whitish-yellow shoulder marks. Tegula tinged with whitish-yellow anteriorly. Subtegular ridge brown. Epicnemium with a small whitish-yellow spot. Wings hyaline. Veins and pterostigma brown to blackish-brown except for yellowish-brown wing base. Legs whitish-yellow to yellow. Fore and mid coxae tinged with black basally. Hind coxa, tibia and tarsomeres black. Hind trochanter, trochantellus, apex of hind femur and base of hind tibia tinged with white. Hind femur brown.

Distribution.

Japan (Honshu).

Bionomics.

Host unknown. Most adults were collected in broad-leaved forests of mountainous regions. One paratype collected from the Nagano Prefecture was collected by light trap.

Etymology.

The species name refers to the scutellum having coarse punctures.

Remarks.

This species can be easily distinguished from any other species by the entirely black scutellum and the coarse and dense punctures on scutellum (separated by ca. 0.8-1.3 × their diameter).

Figures

Figure 6. Woldstedtius punctatus sp. nov. (A-D. female, holotype; E, F. male, paratype) - A, E. Habitus; B, F. Head, frontal view; C. Mesonotum, dorsal view; D. Propodeum, dorsal view.

Figure 9. Japanese Woldstedtius A, G. W. f. flavolineatus (Gravenhorst, 1829); B, I. W. kuroashii (Uchida, 1957); C, D, K. W. takagii (Uchida, 1957); E. W. alpicola sp. nov.; F. W. biguttatus (Gravenhorst, 1829); H. W. karafutensis (Uchida, 1957); J. W. punctatus sp. nov. (E, J. holotype; B, I. paratype) - A, B. head, lateral view; C. head, frontal view; D. propodeum, lateral view; E-K. T I, dorsal view.